- AMotion of a cricket ball
- BMotion of dust particle
- CA hydrogen atom
- DA neutron changing to a proton
Explanation:
The formulation or rules of classical physics are quite accurate for heavy bodies having finite velocities like the planets, vehicles etc. For particle much smaller than 10−6m (such as atoms, nuclei etc.) these rules do not work well.
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In above question the energy of the characteristic X-rays given out is
|
(a) Less than 40 keV |
(b) More than 40 keV |
(c) Equal to 40 keV |
(d) ≥ 40 keV |
Four metallic plates each with a surface area of one side A are placed at a distance d from each other. The plates are connected as shown in the circuit diagram. Then the capacitance of the system between a and b is
|
(a) |
(b) |
(c) |
(d) |
A metal wire of specific resistance 64 and length 198 cm has a resistance of 7 ohm, the radius of the wire will be
|
(a) 2.4 cm |
(b) 0.24 cm |
(c) 0.024 cm |
(d) 24 cm |
A charged particle is released from rest in a region of steady uniform electric and magnetic fields which are parallel to each other the particle will move in a
|
(a) Straight line |
(b) Circle |
(c) Helix |
(d) Cycloid |
A polaroid is placed at 45o to an incoming light of intensity . Now the intensity of light passing through polaroid after polarisation would be
|
(a) |
(b) |
(c) |
(d) Zero |
A coil has an area of 0.05 m2 and it has 800 turns. It is placed perpendicularly in a magnetic field of strength 4
, it is rotated through 90° in 0.1 sec. The average e.m.f. induced in the coil is
|
(a) 0.056 V |
(b) 0.046 V |
(c) 0.026 V |
(d) 0.016 V |
Three capacitors of capacity are connected in series. Their total capacity will be
|
(a) |
(b) 1/ |
|
(c) ( |
(d) None of these |